Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4668244 | Method and apparatus for upgrading low rank coal | Yoichi Nakamura, Akio Yamamoto, Goro Kurita, Jinichi Tomuro | 1987-05-26 |
| 4523927 | Method of coal upgrading | Hiroshi Yokoyama, Shunsuke Nogita, Yoichi Nakamura, Katsumi Muroi | 1985-06-18 |
| 4511363 | Method of upgrading low-rank coal | Yoichi Nakamura, Akio Yamamoto, Shunsuke Nogita, Katsumi Muroi | 1985-04-16 |
| 4461627 | Upgrading method of low-rank coal | Hiroshi Yokoyama, Shunsuke Nogita, Yoichi Nakamura | 1984-07-24 |